There's also robotic surgery, which is Dr. Tewari's specialty. It's been around for about 15 years and it minimizes bleeding, is less invasive and allows for better visual magnification of the cancer.

"Three things combined, prostate cancer surgery becomes easier, so that is the reason why most of the operations are done now with the robot," said Dr. Tewari.

African-American men are particularly vulnerable to the disease, especially if there's a family history of it.

"They do have 1.5 times greater risk of having prostate cancer and twice the mortality of they get it," said Dr. Tewari, who admits the disease can be overtreated and overdiagnosed, but he also stresses the importance of exercise, before and after any treatment..

"When they're walking, they have a lower risk of having a blood clot, lower risk of having pneumonia and feel better, so exercise is an important component part of our program, both before and after surgery," he said.

"Pretty much within three months I was back to doing what I was usually doing, back on my bike cycling, starting to get back in shape with all of that," said Ken.